Increase the refcount in FcConfigSetCurrent()

https://bugs.freedesktop.org/show_bug.cgi?id=82432

fc-cat/fc-cat.c

@@ -298,6 +298,7 @@ main (int argc, char **argv)
 	return 1;
     }
     FcConfigSetCurrent (config);
+    FcConfigDestroy (config);
     
     args = FcStrSetCreate ();
     if (!args)

src/fccfg.c

@@ -434,6 +434,7 @@ retry:
     if (!fc_atomic_ptr_cmpexch (&_fcConfig, cfg, config))
 	goto retry;
 
+    FcConfigReference (config);
     if (cfg)
 	FcConfigDestroy (cfg);
 
@@ -2405,6 +2406,10 @@ FcConfigSetSysRoot (FcConfig      *config,
     {
 	config = FcInitLoadOwnConfigAndFonts (config);
 	FcConfigSetCurrent (config);
+	/* FcConfigSetCurrent() increases the refcount.
+	 * decrease it here to avoid the memory leak.
+	 */
+	FcConfigDestroy (config);
     }
 }
 

src/fcinit.c

@@ -189,11 +189,18 @@ FcBool
 FcInitReinitialize (void)
 {
     FcConfig	*config;
+    FcBool	ret;
 
     config = FcInitLoadConfigAndFonts ();
     if (!config)
 	return FcFalse;
-    return FcConfigSetCurrent (config);
+    ret = FcConfigSetCurrent (config);
+    /* FcConfigSetCurrent() increases the refcount.
+     * decrease it here to avoid the memory leak.
+     */
+    FcConfigDestroy (config);
+
+    return ret;
 }
 
 FcBool